Make priority attribute boolean and bugfixing traffic lights #442

Job	Run time
test-binding-development	2m 17s
test-binding-installation (macos-latest, 3.10)	6m 1s
test-binding-installation (ubuntu-latest, 3.12)	4m 28s
test-binding-installation (windows-latest, 3.12)	20m 52s
test-binding-installation (windows-latest, 3.10)	19m 58s
test-binding-installation (ubuntu-latest, 3.10)	4m 13s
test-binding-installation (macos-latest, 3.12)	4m 31s
	1h 2m 20s

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